Transformation of computer programs and eliminating errors

A computer program product, comprising one or more computer readable hardware storage devices storing computer readable program code therein, said program code containing instructions which, upon being executed by one or more processors of a computer system, implement a method for transforming a first computer program having a plurality of program statements to a second computer program, said method comprising:

• parsing, by one or more processors, each program statement in the first computer program, wherein said parsing comprises:
• (i) identifying, in the first computer program, a first program statement that includes a first error and has thrown a parsing exception with respect to the first error prior to said parsing, and (ii) replacing the first program statement by a predefined program statement that is an executable equivalent program statement to the first program statement and can be parsed without throwing any parsing exception;
• and
• translating, by the one or more processors, the parsed first computer program to the second computer program, wherein said translating comprises:
• (i) identifying a second program statement in the parsed first computer program that includes a second error and has thrown a translation exception with respect to the second error prior to said translating, (ii) rolling back said translating to a predefined check point prior to the second program statement in the parsed first computer program such that the predefined check point is associated with a statement in the parsed first computer program that was successfully translated during said translating, and (iii) generating an executable equivalent translation for the second statement that does not throw a translation exception;
• and
• after said translating, generating, by the one or more processors, a mapping of one or more statements in the second computer program to one or more statements in the first computer program.

A computer system comprising one or more processors, a memory coupled to the one or more processors, and one or more computer readable hardware storage devices coupled to the processors, said one or more computer readable hardware storage devices containing program code which, upon being executed by the one or more processors via the memory, implements a method for transforming a first computer program having a plurality of program statements to a second computer program, said method comprising:

• parsing, by the one or more processors, each program statement in the first computer program, wherein said parsing comprises:
• (i) identifying, in the first computer program, a first program statement that includes a first error and has thrown a parsing exception with respect to the first error prior to said parsing, and (ii) replacing the first program statement by a predefined program statement that is an executable equivalent program statement to the first program statement and can be parsed without throwing any parsing exception;
• and
• translating, by the one or more processors, the parsed first computer program to the second computer program, wherein said translating comprises:
• (i) identifying a second program statement in the parsed first computer program that includes a second error and has thrown a translation exception with respect to the second error prior to said translating, (ii) rolling back said translating to a predefined check point prior to the second program statement in the parsed first computer program such that the predefined check point is associated with a statement in the parsed first computer program that was successfully translated during said translating, and (iii) generating an executable equivalent translation for the second statement that does not throw a translation exception;
• and
• after said translating, generating, by the one or more processors, a mapping of one or more statements in the second computer program to one or more statements in the first computer program.